Brake shoe turning machine



19,"; 193 3. s. WHITWORTH ET AL 1,940,474 BRAKE SHOE TURNING momma:

Filed Nov. 8. 1930 2 Sheets-Sheet 1 II I o 92 K" A 1 I INVENTOR. LELAND E. La/va STANLEY WH/TWOATH BY a w I BRAKE SHOE TURNING MACHINE Dec. 19, 1933.

Filed Nov. 1930 2 Sheets-Sheet 2 5& 42 E %v 2 2g, 5

INVENTOR. LELAND E. Laws F zg,3

' as shown in Figure 3.

tions are beveled as shown in Figure 3, to facili-V tate inserting the shoe webs between them.

Patented Dec. 19, 1933 BRAKE silos TURNING MACHINE Stanley Whitworth antenna E. Long, South Bend, Ind., assignors to Bendix Brake Company, South Bend, Ind., a corporation of Illinois AppIicationNovemlier S,1936. Serial No. 494,352 r 5 Claims. (01. 82-2) V This invention relates to machines for turning or otherwise operating on brake shoes or the like, and is illustrated as embodied in a turret type of machine having a series of cutting tools. Various features of the invention, relate to the construction of the turret to hold the shoes, to"

the operation of the cutting tools, to a novel device for feeding shoes to the turret or its equivalent, to an ejecting means for the turned shoes,

and to 'thearrangement of thesevarious ele-' embodiment shown in theaccompanyingdrawe ings, in which;

Figure 1 is a perspective view of the machine;

. Figure 2 is a perspective view of the turret and feeding means, with the latter in a different position from Figure 1; V

Figure; 3 is a vertical section through the turret;

Figure 4 is a section through the shoe-holding means at the end of one of the arms of the'feeding means; and

Figure 5 is a detail perspective view of part of the turret, showing the mounting of oneof the leaf springs used to eject the turned shoes.

The illustrated machine includes, a suitable hollow table or supporting frame 10 having a door 12 afiording access to the parts mounted in the interior, and on the top of which is mounted a stationary support in the form of a transverse arm 14.

At the center of the machine is a turret, indicated generally at 16, and which includes a base 18 rotatably mountedon suitable bearings on the table 10 and formed with an internal gear '20'driven by a pinion 22 operated by a suitable electric motor mounted in any desired manner inside of the table 10.

Bolted or otherwise secured to the base 18 is a circular lower section 24, to which is secured a driving column 26 on which are keyed a series of intermediate circular sections 28 and an upper section 30. Thesections 2428-30 are arranged to grip between them the webs of Ibrake shoes or the like, with the rims of the shoes supported by the periphery of the sections The edges of the sec- The sections are urged apart, to permit the insertion or removal of theshoes, by means such as springs 32 confined between the lower faces of the movable sections 28 and the upperrfaces of "stops 34 secured'to the column 26. Stops 34 may be made in two semicircular pieces set into grooves in the column 26 and-fastenedtogether by screws or the like.

Springs 32 urge the sections 28 upwardly against the stops, thereby releasing the shoe :webs, and the shoes are thereupon ejected by means'such as leaf springs 36 fastened at their centers in the bottoms of peripheral grooves 38 in sections 28 and having'their ends engaging therims of the shoes. The insertion of the shoes when loading the turret depresses the springs 36 into their grooves 38. The upper section'30 is fastened to a sleeve 40 sliding on the column 26 inside'of a bearingj2 carried by the supporting arm 14. Sleeve 0 in turn is fastened to'the base-fi l era double ended movable air cylin'der 46, within which is a suitable pistonlnot shown) having astationary piston rod' ifiiastened to thetop of the column 261 Compressed air is suppliedto the movablecylinder 46, above or below its 1 stationary piston, through a suitable'fitting 50 mountedgon the; upperend of the stationary piston rod 48'Qby means I of conduits such as pipes 5 2,*u'nder the control of valvesoperated by two pedals 54. One of the pedals 54 causes the cylinder 46, "with 5 the section 3(l,'to be raised to-release and eject the shoes, while the otherpedal causes the cylinder 46, with section 30, to be'forced downwardly to grip the shoes whilethey are being turned. V V

Shoes mounted on the turret while it is rotating are operated on'by means such as a series of cut ters'56adjustably clamped onarslidebe-raised and loweredby'a screw 60 operated by a motor 62.; The

the slide cannot be moved again until the direction of the motor is reversed. n The circuits of both motors, i. e., motor 62 and the motor for the turret, are broken or completed not only by the automatic switch 68 which stops the machine automatically when one load of,

shoes has been turned, but also by a manually operated switch 74. Switch 74 has three positions,

one extreme position in which the motor 62 is turning in one direction and in the other of which this motor is reversed, and in both of which positions the turret motor is driven in the same direction, together with an intermediate switch position in which both motor circuits are broken and the machine stopped.

The shoes are fed to the turret, after ejection of the shoes previously turned and while the turret sections are separated, by apparatus shown as including a pair of arms pivoted at opposite ends of a shaft 82 journaled in the supporting arm 14.

in such a manner as to turn with the shaft while yet being capable of movement toward and from each other.

Each arm 80 has rockably mounted thereon a 7 head 84 (Figure 4), provided with means such as pairs of leaf springs 86 arranged yieldingly to grip the shoes by the rims with the webs presented outwardly, as the operator'inserts them when the arms 80 are in the-positionof Figurel. A suitable counterweight 88 is linked'to the rear end of .one arm 80,so that'the arms arepractically balanced when carrying a full load of eight shoes, whereby the operator can readily swing the feeding apparatus to the position of Figure 2, with his leftrhand.

Between the rear ends of the arms 80 is arranged a compressed air. cylinder and piston assembly 90, the piston being connected to one arm and the cylinder to the other. Air is supplied by flexible hose conduits 92, under the control of a suitable valve 94 arranged to be controlled by the operators right hand.

Assuming the machine in the position of Figure 1, with a load of shoes just turned, the operator having loaded the arms 80, the operator now steps on the proper pedal 54, whereupon the air moves the cylinder 46 and the sections 28 upwardly, releasing the turned shoes, which are thereupon ejected by the springs 36.

The operator next swings the arms 80, with his left hand, to the position of Figure 2, and then manipulates valve 94 with his right hand to cause the arms 80 to swing toward each other to insert V slide 58 begins to move slowly upwardly (or downwardly, as the case may be).

The operator then like comprising a rotatable turret arranged to supporta plurality of shoes on each side by gripping their webs and leaving their rims substantially unobstructed, a tool having cutters for operating on the rims of said shoes, and a feeding device for mechanically supplying unturned shoes to said turret.

2. A machine for turning brake shoes or the like comprising a rotatable turret arranged to support a plurality of shoes on each side by gripping their webs and leaving their rims'substantially unobstructed, and a feeding device for mechanically supplying unturned shoes to said turret. I Q

3. A machine for turning brake shoes and the like comprising aturret and a motor for driving it, in combination with an adjustable support having a reversible motor mounted'thereon" and provided with a slide carrying cutting means ar ranged to operate on work-carried by the turret and driven by said motor in both directions, together with a controlling device having two positions, one arranged to cause the reversible motor to drive the slide in one direction and the other to cause it to drive the slide in the other direction and both arranged to cause the first motor to drive the turret in the same direction.

4. A machine comprising a turret constructed and arranged to hold brake shoes orthe like by the webs with their rims substantially unobstructed, in combination with feeding means constructed and arranged to hold such shoes by the rims with the webs unobstructed and to present them in position for the gripping of said webs by the turret. l a

5. A machine comprising a turret constructed and arranged to hold brake shoes or the like by the webs with their rims substantially unobstructed, in combination with feeding means constructed and arranged to hold such shoes by the rims with the webs unobstructed and to present them in positionfor the gripping of said webs by the turret, and power means for moving the feeding means to present the shoes in said position.

CERTIFICATE 0F CORRECTRON.

Patent No. 1,940,474. December 19, 1933.

STANLEY WHITWQRTH, ET AL.

It is hereby certified that error appears in the printed specification of the above numbered Patent requiring correction as tollows: Page 2, second column, after line l29, insert the following as claim 6;

6. A machine comprising a turret constructed and arranged to hold brake shoes or the like by the webs with their rims substantially unobstructed, in combination with feeding means constructed and arranged to hold such shoes by the rims with the webs unobstructed and to present them in position for the griping of said webs by the turret, and cutting means for operating on the rims of shoes carried by the turret.; and that the said Letters Patent should he read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 19th day of March, A. D. 1935.

Leslie Frazer (Seal) Acting Commissioner of Patents. 

